Potential nitrogen mineralization responses of urban and rural forest soils to elevated temperature in Louisville,KY

Soil nitrogen (N) mineralization is an important process determining terrestrial N availability, and evidence suggests elevated temperatures will enhance N mineralization rates. Along a 40 km urban-rural gradient of chestnut oak forest stands in Louisville, KY, we expected N mineralization rates would be higher in urban than in rural forests in part due to increased temperatures caused by the urban heat island. However, a 12-month field study along this Louisville gradient showed that annual N mineralization rates were lower in urban than in rural stands. Since variation in precipitation inputs and other factors across this land-use gradient may be influencing soil N mineralization rates, we conducted a three-month soil incubation experiment in the lab to determine the extent to which a + 2 °C temperature difference could affect soil N mineralization in urban and rural soils. Across the range of temperatures tested, rural soils mineralized N at twice the rate of urban soils under base (7.86 vs. 3.65 mg N kg^?1 AFDW soil d^?1) and elevated (9.08 vs. 4.76 mg N kg^?1 AFDW soil d^?1) temperatures (p < 0.01). A 2 °C temperature difference, did not significantly alter total inorganic N production in urban (p = 0.272) or rural soils (p = 0.293). The proportion of nitrate produced was lower in the urban (15.1 %) than in the rural soils (72.3 %; p < 0.01). These results suggest that differences in soil organic matter quality and potentially decomposer community composition are the primary explanatory factors for forests along this Louisville gradient.     

天津城乡空间发展的生态环境保护

一、天津市域生态环境区划与自然保护区布局体系（一）市域生态环境区划1、区划的概念与作用。生态环境区划是广义的环境功能分区,它是实施城市环境的分区管理和污染物总量控制的基础和前提。该区划以区域环境质量的改善为目的,依照区域功能的不同、环境质量标准的不同,分别采取相应的对策。     

Demographic and socioeconomic determinants of female rural to urban migration in Sub-Saharan Africa

Data from the 1986-90 Demographic and Health Surveys of Burundi, Ghana, Kenya, Mali, Nigeria, Senegal, Togo, and Uganda were used to examine the impact of fertility, child mortality, and socioeconomic and demographic factors on female rural-urban migration of six months or more duration. Several principles appear to direct the migration of high fertility women. High parity women are free from the male demands for more children. Rural areas lack basic amenities such as schools, health services, and modern housing. Additional children may strain family resources and require additional income from other sources. Husband and kin may have already moved. All data are nationally representative, with the exception of Uganda with an 80% sample. Women living in rural areas two years prior to the survey were included in the sample. Fertility and mortality data pertain to children aged under five years in the period two to seven years before the survey year. Multinomial logit analysis was based on an analytical model developed by Goldstein and Goldstein. High fertility was found to deter female migration to either urban or rural areas. Women, who had one surviving child aged under five years, were significantly less likely to move to urban areas only in Nigeria and Senegal and to other villages in Burundi compared to women without a recent birth. Women with two or more surviving children were significantly less likely (by 43-75%) to move to urban areas in five out of seven countries. Moves to rural areas were less likely by 36-61% in six out of eight countries. The evidence does not suggest that the reason for moves is to advance the children's material or physical well-being. The number of births, particularly in Kenya where fertility is very high in rural areas, acts as a deterrent to migration. Child mortality only constrains moves to urban areas. Unmarried women, single women, better educated women, and adults in their 20s are more likely to move to urban areas.     

(Un)Making home at the borderlands of the rural and the urban: Chinese migrant women’s narratives

This study examines the discourses collected in interviews with second-generation Chinese rural migrant women in Chongqing to unpack how they make sense of home. Guided by Blunt and Dowling’s (2006 Blunt, A., & Dowling, R. (2006). Home. New York, NY: Routledge.[Crossref] , [Google Scholar]) critical geography of home and Anzaldúa’s concept of borderlands, we interpret three overlapping themes: (a) constantly (re)making “home” that is neither here nor there; (b) bordering in-between aging parents and young child(ren); (c) social and political changes (un)making home in migration. Our findings endorse approaching “home” as a verb to better capture complex experiences with homing at borderlands.     

完善社会主义市场经济时期的城乡规划体系

当前我国正处在由建立社会主义市场经济向完善社会主义市场经济推进的时期,作为深化体制改革和完善市场经济体制的要求以及推进政府职能转变的重要内容,城乡规划正逐步从计划经济条件下政府发展目标的技术工具,向完善市场经济条件下的政府公共政策转变.     

天津城乡空间发展规划研究报告

以区域经济为主的经济发展模式正在成为中国经济发展格局的重要特征,京津冀北地区的整体发展是天津实现城市发展目标的基础和动力。     

Comparison of multiple behavioral traits between urban and rural squirrels

Urban Ecosystems - Recent rapid urbanization has imposed novel challenges to animals. Urban animals alter their behaviors such as increased boldness, exploration, and aggressiveness to cope with...     

Reporting and founding of child neglect in urban and rural communities

The community context in which child abuse and neglect takes place may influence both reporting and outcomes of investigations into such incidents. This study examines and contrasts urban versus rural community perceptions of neglect by lay citizens and protective service workers.     

集体建设用地流转与统筹城乡发展

一、集体建设用地流转提出的背景及内涵 (一)集体建设用地流转提出的背景 土地是城市发展不可缺少的资源,城市经济的发展、城市建设的进行以及城市人口的增加必然会使建设用地需求增大,单纯的城市内部用地不可能满足城市人口增长和产业发展的需求,城市规模的扩张不可避免,许多城市如北京、上海、天津、广州等,城市周围的若干区县已建设成为城市新区,而土地征用成为当前国家建设用地的主要增量来源.     

Suicide ideation among a stratified sample of rural and urban adolescents

This study examined factors associated with sucidal ideation among a stratified sample of rural and urban adolescents. Data was collected on 1,728 eighth and tenth grade southern Nevada students from 23 schools. No overall differences were found between rural and urban adolescents, although results did indicate that grade, gender, and school achievement variations exist between rural and urban student populations. Implications for social workers and other youth service providers are discussed.     

Renaissance of a rural artifact in a city with a million people: biodiversity responses to an agro-forestry restoration in a large urban traditional fruit orchard

The rural landscapes surrounding large cities are rapidly becoming incorporated into the urban environment. The most conspicuous changes involve green spaces, such as former agro-forestry systems like fruit orchards. In this paper, we assess the influence on biodiversity of restoring a large urban traditional fruit orchard as reflected by six selected taxa: plants, lichens, butterflies, beetles, orthopteroids and birds. The study was performed in Prague, which is the capital city of the Czech Republic and has more than a million inhabitants. We studied the effect of orchard renewal in 45 patches (15 for birds and 30 for other taxa). The majority of taxa responded positively to the restoration. The restoration had a significant positive effect on the species richness of lichens, butterflies and beetles. All taxa showed significantly altered species compositions, and the number of red-listed species increased. Orchards have a high potential for multi-functional use. Orchards are productive agro-forestry systems and host numerous possible human activities. Therefore, orchard restoration also has a social aspect. Moreover, our research in this artificial ecosystem revealed that its restoration increased the biodiversity and conservation potential of the associated areas.

     

Local responses to central state restructuring of social housing provision in rural areas

This paper examines local impacts of recent central state restructuring of social housing provision in rural areas. Positioning such changes within a context of wider discussions on local government restructuring and regulation theory, attention is focused on some key local responses to social housing restructuring in two areas of rural Wales in the early 1990s. In this section of the paper consideration is given to the increasing residualization of the local social housing sector, changing systems of social housing allocation and management, and the localized mediation of central state restructuring of social housing through different housing agencies.     

Effects of human-related disturbance on breeding success of urban and non-urban blue tits (<Emphasis Type=Italic>Cyanistes caeruleus</Emphasis>)

There is a need to study the effects of urbanization on wildlife in order to understand the ecological implications of increasing urbanization and find out how to reduce its threats to biodiversity. The blue tit evolved as a forest species and prefers deciduous and mixed forests, whereas its nesting in urban habitats is a more recent phenomenon. Our long-term study of blue tit populations has been conducted in two habitats: an urban parkland (frequently visited by people) and a deciduous forest outside of the city. Using linear mixed modeling, we revealed that a relationship of blue tit breeding success (and the number of fledglings) with thermal conditions in May differed between the urban parkland and the forest. While the relationship was positive in the forest, it was negative in the parkland. In addition, breeding success in the parkland increased with increasing number of rainy days in May. We argue that the main possible reason for such patterns is human activity in the parkland, which interferes with tit parental care, especially the regular feeding of nestlings, whereas it is evidently associated with weather conditions. Human disturbance in the forest is likely to be negligible.     

加快完善上海城乡基本社会保障机制研究

本文以促进上海城乡社会保障协调发展、提高上海社会保障效力为目标,研究完善上海社会保障机制的方法和策略,在对上海现行城乡社会保障机制进行现状评估的基础上,重点从三个方面进行突破：一是对上海社会保险项目重新进行目标定位、对覆盖的人群进行重新界定,进而对上海社会保障体系进行“顸层设计”,提出完善的上海城乡社会保险制度体系及内容;二是着重探讨上海社会保障城乡待遇的合理梯度和各基本社会保险项目之间的衔接机制,以探寻实现社会保障目标模式的路径及其手段;三是提出“十二五”时期上海市城乡社会保障机制建设的主要目标、任务,以及实现目标任务的时间表和保障措施,以期为政府决策提供咨询和参考。     

城乡一体化过程中上海农村社会事业发展对策研究

城乡一体化是经济社会发展的一般规律,是传统农业社会向现代工业社会演变的必然过程,也是现代化的组成部分。城乡一体化的核心是城乡居民的地位一体化、机会一体化、保障一体化。必须从制度上建立一套保障城乡一体化的系统,其中,推进农村社会事业发展更是至关重要。农村教育、卫生、文化、体育、社会保障、社会服务等社会事业的发展水平,某种程度上可以用来衡量一个国家或地区经济社会的发展水平。因此,加强上海农村社会事业发展不仅与广大农民群众的切身利益和农村、农业的发展需要密切相关,而且对于破除城乡二元结构、加快城乡一体化进程、建设现代化国际大都市,实现＂四个率先＂,以及对于探索转型期农村公共产品供给制度的创新、建立与完善农村公共产品和服务供给模式等,具有重要的战略意义、理论意义和应用价值。     

Patterns of human disturbance and response by small mammals and birds in chaparral near urban development

We report on the extent of disturbance (including habitat alteration and road and trail proliferation) in chaparral near urban development and analyze the effects of disturbance on small mammal and resident bird species. Disturbance patterns were evaluated in a 6700 ha study area in southern California: effects on mammals and birds were investigated by analyzing relationships between vegetation structure and animal species richness and abundance. Disturbance was prevalent throughout the study area and included extensive human-altered habitat (from past human activities such as vegetation clearing, human-caused fires, refuse dumping, and vegetation trampling) and 157 km of roads and trails. A nonsignificant trend was found between human-altered habitat and proximity to development, but human-altered habitat was significantly associated with roadway proximity. Trails were also more frequent near urban development and roads. Small mammals responded strongly to disturbance-related vegetation changes, while birds showed little or no response. Mammals endemic to chaparral vegetation were less diverse and abundant in disturbed sites, whereas disturbance-associated species increased in abundance. Close proximity of urban development to natural areas resulted in alteration of natural habitat and proliferation of roads and trails. Variation in life history traits between birds and mammals may affect response to disturbance and influence persistence if disturbance continues. Conservation efforts must recognize the potential for habitat damage and associated declines in native animal species caused by disturbance near urbanization and implement strategies to reduce these threats.     

Risk of bird predation and defoliating insect abundance are greater in urban forest fragments than street trees

Predation by natural enemies is important for regulating herbivore abundance and herbivory. Theory predicts that complex habitats support more natural enemies, which exert top-down control over arthropods and therefore can reduce herbivory. However, it is unclear if theory developed in other more natural systems similarly apply to predation by vertebrate and invertebrate natural enemies across urban habitats of varying complexity. We used plasticine caterpillar models to assess risk of predation by birds and insects, collected leaf-feeding arthropods, and measured herbivory in willow oak trees (Quercus phellos) in two seasons to determine how predation influenced herbivory across urban forest fragments, street trees planted near forest fragments, and downtown street trees. Predation attempts by birds and abundance of chewing folivores were greater on trees growing in urban forest fragments than downtown street trees. Bird predation attempts and herbivory levels were inconsistent for near-forest trees. Predation attempts by arthropods did not statistically vary among the three urban tree habitats. Contrary to expectations based on theory, chewing folivore abundance and herbivory were generally highest on trees growing in urban forests, the most complex habitat we studied, and the habitat where risk of bird predation was greatest. We suggest that urban forest fragments provide better habitat than other urban landscapes for both urban birds and chewing folivores by having greater habitat complexity. Therefore, basal resources, such as availability of suitable habitat, mediate top-down effects on herbivores in cities.

     

Othering the rural: About the construction of rural masculinities and the unspoken urban hegemonic ideal in Swedish media

Studies within the field of rural geography have lately to a noticeable extent enriched the theme of the creation of masculinities and femininities focussing on social constructions of the rural, as well as social constructions of gender. In this study I aim to discuss some expressed discourses of the rural in order to illuminate the power relation between the urban and the rural and the spatial implications of the construction of masculinities and femininities.Taking three Swedish television productions as a point of departure, I will argue that an urban hegemony exists and that the programmes reveal how rural masculinities are constructed. The aim is firstly to add a spatial dimension to the constructions of masculinities, and secondly to show how media builds up and emphasises a gap between the rural and the urban in these constructions. Cutting-edge media is of interest, as it is active in reproducing certain practices and also in identifying who is following the norm and who is deviating from it. The three television productions highlight the construction of rural masculinities in terms of seeking help and being ‘backward’; that rural men are unequal and traditional as well as deviating and out of place.     

The protective role of religious coping in adolescents' responses to poverty and sexual decision-making in rural Kenya

In this study, we explored how adolescents in rural Kenya apply religious coping in sexual decision-making in the context of high rates of poverty and Human Immunodeficiency Virus (HIV). Semi-structured interviews were conducted with 34 adolescents. One-third (13) reported religious coping related to economic stress, HIV, or sexual decision-making; the majority (29) reported religious coping with these or other stressors. Adolescents reported praying for God to partner with them to engage in positive behaviors, praying for strength to resist unwanted behaviors, and passive strategies characterized by waiting for God to provide resources or protection from HIV. Adolescents in Sub-Saharan Africa may benefit from HIV prevention interventions that integrate and build upon their use of religious coping.